There is an edit button you know But anyway, I have both racquets and personally wouldn't use either for singles. If I did choose one then it would be bs12 because sometimes the bs15 feels inconsistent especially when I'm tired...maybe because of the frame design. If I wanted a bravesword for singles and doubles I'd go for a bs10 or bs11, but my mx60 already does a great job of that.
I do have a bs 10 but i think its not too good for singles, would you recommend the mx jjs for singles and doubles?